Improvement in sewing-maghinesl



A.v LEYDEN.

Sewing Machine. No. 26.687. Patented Jany. 3, 1860.

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p N ly 1 UNITED STATES PATENT OEEicE,

AUSTIN LEYDEN, or ATLANTA, GnoneiAli IMPROVEMENT |NSEWING- MACHI'NEen l,'5g i l Specification forming partof Letters Patent No. 26,687, dated3Jianu ary3, d if To CLZZ whom it may don/cern:

Be it `known that I, A. LEYDEN, of Atlanta, in the county of Fulton andState of Georgia, have invented cer-tain new and useful Improvements inSewing-Machines; and I jdo hereby declare that the following is a full,clear, and exact description of the same, reference being hadto theaccompanying drawings, forming part of this specification, in which-Figures land 2 are vertical sections at right angles 4to each other,exhibiting such parts of a sewing-machine as are necessary to illustratemy invention. Fig. 3 is a plan of the same with part of the bed-platebroken away. Fig. 4 exhibits a sectional viewof the spool-holder and itsbed. Fig. 5 is a horizontal section of the spool-holder forthelocking-thread. Fig.

6 is a plan of the bed which supports the spoolholder. y

Similar letters of reference` indicate corre sponding parts in theseveral figures.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction'and operation.

A is the bed-plate of the machine, upon which the material to be sewedifis laid. n is the needle, andV B is the needle-arm, secured to arock-shaft, C, which maybe operated by an eccentric,D, on a shaft, E,and a rod, D', or in any other well-known manner.`

Fis the main shaft arranged at right angles to E, and geared therewithby miter-gears a b, so as to giveit a constant rotary motion.

The pressure-pad and feed-works are not represented, as they may beconstructed, applied, and operated in anyof the usual modes.

Gis an upright plate, secured to the bottom bed H hasan opening, c c,the form of which is best shown` in Fig.` 6, for the spool-holder I torest in, the margin of the said opening being rounded on" or beveled,that the loops of spool-holder.

The spool-holder I consists of open frame, e l ,l

whose form will be well understood by a; coin"-` parison of Figs. 1, 3,4, and, its" ,bottom lbe-` ing concave, that .its own1 fweight, `.whenthe 1 spool K of locking-threadisyin itpniay be suf?` f l iicient tocause it to` restfwithin the `opening c` t c of the bedIrI. C ThespoolKgis secured` toja 1. screwed spindle, d, whichypasseslthrough it,"by means of twoconical nuts, e e, fitting into its'ends, andthe said`spindle is heldbetween M H y two centers, f g, `in the ends oftheholdenthe 1 former centerbeing movable toperinitithe in-, ,e ltroduction ofthespindle. Thismodeof ap-- i plying the spools admits ofthe use of spools of any of the sizes upon whichthe thread may bebought. The necessarytensionis produced l on the thread of the spool 3Kby means` of an; t e elastic friction-brake lever, h,l(best.sho`wn fin eFig. 4,) which is attachedl to l one end ofthe1 spool-holder byafulcruingpin, k, `and pressed e against one ofthe conical nuts c` e bymeans 1e of aset-screw, j, which screws a lug, I, formed onthe interiorofthe spool-holder, the` said l screw being capable of producing more orless y Y friction by being screwed l in more jorfless against the leverhe.` e `The thread passeszlfrom the spool through an opening, l, inthetop of" t l the spool-holder L@ The".spoolholderfwith" e the spool init, is putn` its place inthe'bed H through an opening, m m,` in thebed-plate:

. A, but this opening iscovered` when the maf` t chine is .in operativeconditiontby a plate," J." f The position occupied by the ispoolfholderkis i such that theaxisof the `spool Iv is` parallel l withthe face of thebed-plate, and obliqueltl l the direction of thefeed-motions,`

Lis a looper. .by `which the spoolsM of needle-threadare flrstextended,preparatory le e to their being passed overthespool-holder:Il`

The form of thisloopermay,beimderstoodby l l comparison of Figs. 1, 2,and. Itconsistsof e a steel plate of nearly triangular 1form,provide`d ewith a hook, o,` at one corner, and with a1 shalll low parallel groove,p l p, in its face, and it is ar ranged to oscillate on a iixedpin",1\g,whichat-` e taches it to the plate Gr." The said `lcloper dee lrives amo'vement from the positionshownin black in Fig. 2 to theposition shown inured,

and back again, being about quarter` of a 1 revolution, [from acan1,M,`;`on theshaft4 iE, the

said cam operating on a lever, N, which works on a fixed fulcrum, o",and which is connected with the looper by a rod, N.

I), Figs. 1 and 3, is what I term a swivelhook consisting of a short butbroad hook, iitted to turn horizontally upon an upright spindle, s,whichis caused to revolve horizontally round the spool-holder I and its bedvII by being secured to a revolving carrier, P', which is fitted to theXed upright studwhich supports the spool-holderbed, and which derivesmotion from the shaft E through a pair The object of this hook is ofruiter-gears, .t u. to take the loop of the needle-thread from thelooper L and pass it over the spool-holder I; and for this purpose it isso applied as to pass through the groove p p of the looper while thelatter is in theposition represented in black in Fig. 2. The hollow stems of the swivelhook, which receives within it the spindle s,

` is vfurnished belowthe hook with a milled collar, s, which at acertain stage of 'the revolution of the hook around the spool-holder,hereinafter described, comes in contact with the leather or india-rubbercovered face of a stiff curved spring, Q, that is bolted to the bracketH, and so causes the swivel-hookto turn on the spindle s for the purposeof releasing the loop of theneedlethread. A spiral spring, fu, Fig. 1,is applied below said collar s2 for the purpose of throwing the hookback into position for taking the loops from the looper, and a stop isprovided on the spindle to prevent the spring moving the said hookbeyond the proper position.

R, Figs. l and 2, is what I term the loopcontrollen whose duty is totake the loop from the swivel-hook and keep it extended until the looperL commences the extension of the succeeding loop. This loop-controllerconsists of a long arm with a hook at its extremity, ar-

, ranged to swing horizontally upon a iiXed pivc ot, w, securedaunderthe bed-plate A, and deriving the necessary movement from the combinedaction of a cam, S, on the driving-shaft F, anda spring, T, secured tothe bed-plate A. The cam S acts upon the loop-controller through theagency of a lever, U, which works on a Xed fulcrum, x, carried by aiiXedarm,

' H2, secured to the bracket H, and a rod, U',

which connects the said lever with the threadcontroller.

Having described the construction and arrangement and theindividualoperations ofthe several parts of the machine which constitute myinventio'n, I will proceed to describe their combined operation insewing.

As theneedle enters the material to be sewed with its thread the looperL is in the position Shown in black in Fig. 2, and during the com-(shown in Fig. 3,) passes through the groove p p, catches the loop andtakes it off the'looper,VY

and carries it in Ian open condition over the spool-holder I, which,resting loosely in the opening c c of its bed, allows thelowerpart ofthe loop to pass between it and the margin'of `said opening. Theloop-controller R remains stationary in the position shown in Fig. 3until the swivel-hook has arrived'at about the positionv shown in thatgure, and then commences to move in the direction of the arrow 8, and,moving much faster than the swivelhook, overtakes the latter and passesit just as it has been turned on its spindle s to such a position as toallow the loop to slip off it by the collar s2 rolling against theleather or india-rubber on the face of the spring-Q. In this way thethread-controller is made to take the loop out of the way of theswivel-hook and keep it stretched, so as to prevent its kinking, untilthe needle has passed through the material again and the looper L hasentered and commenced the extension of a new loop7 and until theswivel-hook comes into operation on the new loop, and by the extensionof that loop draws up theold one to the back of the material with thelocking-thread in it. In this way one stitch isproduced by everyrevolution of the shafts E and F, the stitch being the ordinarylock-stitch, thesame as produced by the needleand shuttle.

I do not claim the use, in a sewing-machine, of a stationary thread-caseor spool-case to contain the locking-thread; nor do I claim using thelocking-thread in making the lockstitch directly from an ordinary spoolwithout rewinding; but

What I claim as my invention, and desire to secure by Letters Patent,is-

The spool-holder constructed and applied,

in combination with the bed H, substantially as herein described.

AUSTIN LEYDEN.

"Witnesses:

Tiros. L. THOMAS, W. HERRING, ELIAS HoLcoMBE.y

